diff options
Diffstat (limited to 'Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua')
| -rw-r--r-- | Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua | 150 |
1 files changed, 91 insertions, 59 deletions
diff --git a/Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua b/Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua index e3389b9daf7..880fbcc1f4a 100644 --- a/Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua +++ b/Master/texmf-dist/tex/luatex/luaotfload/fontloader-font-ots.lua @@ -784,23 +784,17 @@ function handlers.gsub_ligature(head,start,dataset,sequence,ligature,rlmode,skip -- ok, goto next lookup end end - else -- is the check for disc still valid here ? and why only replace then + else local discfound = false - local lastdisc = nil local hasmarks = marks[startchar] while current do local char, id = ischar(current,currentfont) if char then if skiphash and skiphash[char] then current = getnext(current) - -- if stop then stop = current end -- ? - else -- ligature is a tree - local lg = ligature[char] -- can there be multiple in a row? maybe in a bad font + else + local lg = ligature[char] if lg then - if not discfound and lastdisc then - discfound = lastdisc - lastdisc = nil - end if marks[char] then hasmarks = true end @@ -815,58 +809,89 @@ function handlers.gsub_ligature(head,start,dataset,sequence,ligature,rlmode,skip -- kind of weird break elseif id == disc_code then - -- - -- Kai: see chainprocs, we probably could do the same here or was there a reason - -- why we kept the replace check here. - -- - -- if not discfound then - -- discfound = current - -- end - -- if current == stop then - -- break -- okay? or before the disc - -- else - -- current = getnext(current) - -- end - -- - local replace = getfield(current,"replace") -- hm: pre and post - if replace then - -- of{f-}{}{f}e o{f-}{}{f}fe o{-}{}{ff}e (oe and ff ligature) - -- we can end up here when we have a start run .. testruns start at a disc but - -- so here we have the other case: char + disc - while replace do - local char, id = ischar(replace,currentfont) - if char then - local lg = ligature[char] -- can there be multiple in a row? maybe in a bad font - if lg then - if marks[char] then - hasmarks = true -- very unlikely - end - ligature = lg - replace = getnext(replace) - else - return head, start, false, false - end - else - return head, start, false, false - end - end - stop = current - end - lastdisc = current - current = getnext(current) + discfound = current + break else break end end + -- of{f-}{}{f}e o{f-}{}{f}fe o{-}{}{ff}e (oe and ff ligature) + -- we can end up here when we have a start run .. testruns start at a disc but + -- so here we have the other case: char + disc + if discfound then + -- don't assume marks in a disc and we don't run over a disc (for now) + local pre, post, replace = getdisc(discfound) + local match + if replace then + local char = ischar(replace,currentfont) + if char and ligature[char] then + match = true + end + end + if not match and pre then + local char = ischar(pre,currentfont) + if char and ligature[char] then + match = true + end + end + if not match and not pre or not replace then + local n = getnext(discfound) + local char = ischar(n,currentfont) + if char and ligature[char] then + match = true + end + end + if match then + -- we force a restart + local ishead = head == start + local prev = getprev(start) + if stop then + setnext(stop) + local tail = getprev(stop) + local copy = copy_node_list(start) + local liat = find_node_tail(copy) + if pre and replace then + setlink(liat,pre) + end + if replace then + setlink(tail,replace) + end + pre = copy + replace = start + else + setnext(start) + local copy = copy_node(start) + if pre then + setlink(copy,pre) + end + if replace then + setlink(start,replace) + end + pre = copy + replace = start + end + setdisc(discfound,pre,post,replace) + if prev then + setlink(prev,discfound) + else + setprev(discfound) + head = discfound + end + start = discfound + return head, start, true, true + end + end local lig = ligature.ligature if lig then if stop then if trace_ligatures then local stopchar = getchar(stop) - head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks) + -- head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks) + head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,false,hasmarks) logprocess("%s: replacing %s upto %s by ligature %s case 2",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(lig)) else - head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks) + -- head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks) + head, start = toligature(head,start,stop,lig,dataset,sequence,skiphash,false,hasmarks) end else -- weird but happens (in some arabic font) @@ -876,12 +901,12 @@ function handlers.gsub_ligature(head,start,dataset,sequence,ligature,rlmode,skip logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(dataset,sequence),gref(startchar),gref(lig)) end end - return head, start, true, discfound + return head, start, true, false else -- weird but happens, pseudo ligatures ... just the components end end - return head, start, false, discfound + return head, start, false, false end function handlers.gpos_single(head,start,dataset,sequence,kerns,rlmode,skiphash,step,injection) @@ -3960,12 +3985,14 @@ do a = true end if a then - local ok - head, start, ok = handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step) + local ok, df + head, start, ok, df = handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step) -- if ok then -- done = true -- end - if start then + if df then +-- print("restart 1",typ) + elseif start then start = getnext(start) end else @@ -4023,6 +4050,7 @@ do a = true end if a then + local ok, df for i=m[1],m[2] do local step = steps[i] -- for i=1,#m do @@ -4031,9 +4059,11 @@ do local lookupmatch = lookupcache[char] if lookupmatch then -- we could move all code inline but that makes things even more unreadable - local ok - head, start, ok = handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step) - if ok then +-- local ok, df + head, start, ok, df = handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step) + if df then + break + elseif ok then -- done = true break elseif not start then @@ -4042,7 +4072,9 @@ do end end end - if start then + if df then +-- print("restart 2",typ) + elseif start then start = getnext(start) end else |